7172 /www/nrich/html/content/id/7172/ 1 2011-02-01T00:00:01 <?xml version="1.0" encoding="UTF-8"?> <mdoxml version="1.0"></mdoxml> <?xml version="1.0" encoding="UTF-8"?> <mdoxml version="1.0">In total there are $24$ different ways to paint the tile, which means there are $23$ <span style="font-weight: bold;">other</span> ways to paint it.<br></br></mdoxml> 2 3 0 0 1 0 0 Weekly Problem 21 - 2011 Decision Mathematics and Combinatorics Combinations Numbers and the Number System Counting ajk44 Alison's problems under development